Sorry, you need to enable JavaScript to visit this website.

MCST Banner Image


Mission Operations Days: 2001/237 to 2001/243
August 25, 2001 00:00:00 GMT to August 31, 2001 00:00:00 GMT

Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
MODIS is in Science Mode - A Side
BlackbodyA On (290 K); B OffNominal
Calibration ElectronicsA On; B OffNominal
Control ProcessorA On; B OffNominal
Nadir DoorUnlatched, OpenNominal
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA On; B OffNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 On; #3 & #4 OffNominal
Format ProcessorA On; B OffNominal
Power Supplies#1 On; #2 OffNominal
PV VIS FPAA On; B OffNominal
PV NIR FPAA On; B OffNominal
PV SMIR FPAA On; B OffNominal
PV LWIR FPAA On; B OffNominal
PC LWIR FPAA On; B OffNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA On; B OffNominal
SDSMA Off; B OffNominal
SRCAA Off; B OffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA Off; B OnNominal
Flight SoftwareRev BD + 2 set of patches
  • FR Error Counting and Statistics (2 patches)
  • FR Band 5 Gain Change (20 commands)
Inhibit Ids SetNoneNominal
TMON 66 (SRCA A)DisabledNominal
TMON 67 (SRCA B)DisabledNominal
TMON 68 (FIFO)EnabledNominal
TMON 69 (EPS Current)DisabledNominal

This Week's Completed MODIS Activities:

Saturday, August 25, 2001


Sunday, August 26, 2001


Monday, August 27, 2001


Tuesday, August 28, 2001


Wednesday, August 29, 2001

2001/241 20:21:04 ATC OA-16: SD/SDSM Screened
2001/241 21:59:57 ATC OA-15: SD/SDSM Open

Thursday, August 30, 2001


Friday, August 31, 2001


This Week's Scheduled MODIS Activities Not Completed:

The formatter memory loads were not performed to clear the existing error addresses/counts.

Upcoming MODIS Events:

Friday, August 31, 2001


Saturday, September 1, 2001


Sunday, September 2, 2001


Monday, September 3, 2001


Tuesday, September 4, 2001

Anticipated day to perform memory load to clear FR error/count buffers

Wednesday, September 5, 2001

Two orbits with SMIR Itwk/Vdet of 79/110
SD/SDSM calibrations

Thursday, September 6, 2001


Friday, September 7, 2001



The next Lunar Calibration roll maneuver is scheduled for day 2001/250 (September 7, 2001) with data collection from 20:03:47 to 20:10:17. The roll angle will be -7.5106 degrees.

MODIS Anomalies:

The rate of formatter “error events” has increased during the past week to approximately 60-120 per day. There still have not been any noticeable impacts to operations.

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP).

Note: SD/SDSM calibrations were planned to be reduced to once per two weeks. This plan has been revised; SD/SDSM calibrations will continue to be scheduled once each week until the end of November.

MODIS Telemetry Trends:

Trending has resumed with the instrument on the A-side. With the currently decreasing beta angle, the amount of focal plane heater margin is increasing. The intermediate stage cooler temperature is stable.

Non-MODIS Significant Events:


Limited Life Item Status:

SRCA 10W Lamp #1: 189.1 of 500 hours
SRCA 10W Lamp #2: 144.8 of 500 hours
SRCA 10W Lamp #3: 154.0 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 558.0 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1691 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements